The Mobile Bay Middle Lighthouse, located in Mobile Bay, began operations on December 1, 1885, and Mobilians could observe a white light with red flashes every 30 seconds out in the bay.

The facility was built on an iron undergirding, and both the tower and the hexagonal keeper's house it supported were patterned after lighthouses operating in Chesapeake Bay. The Mobile Bay Middle light used a Fourth Order lens, and when fog covered the bay, a bell sounded every five seconds as a fog signal. The lighthouse was automated in 1935 and deactivated in 1967.

After decades of neglect, the lighthouse underwent almost $350,000 in renovations under the guidance of the Alabama Historical Commission. The original iron tower and light were replaced with a modest pole topped by a solar-powered red light.